<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索与添加区域 -->
      <el-row :gutter="20">
          <el-col :span="8">
            <el-input placeholder="请输入内容" v-model="queryInfo.query"
            clearable
            @clear="getGoodsList">
            <el-button
            slot="append"
            icon="el-icon-search"
            @click="getGoodsList"
            clearable></el-button>
            </el-input>
          </el-col>
          <el-col :span="4">
              <el-button type="primary" @click="goAddpage">添加商品</el-button>
          </el-col>
      </el-row>

      <!-- 用户列表区域 -->
      <el-table :data="goodslist" border stripe="stripe">
          <el-table-column type="index" label="#"></el-table-column>
          <el-table-column label="商品名称" prop="goods_name"></el-table-column>
          <el-table-column label="商品价格(元)" prop="goods_price" width="95px"  align="center"></el-table-column>
          <el-table-column label="商品重量(g)" prop="goods_weight" width="90px" align="center"></el-table-column>
          <el-table-column label="创建时间" prop="add_time" width="140px">
            <template slot-scope="scope">
              {{scope.row.add_time | dateFormat}}
            </template>
          </el-table-column>
          <!-- 操作部分 -->
          <el-table-column label="操作" width="130px">
              <template slot-scope="scope">
                  <!-- 编辑按钮 -->
                  <el-button type="primary" icon="el-icon-edit" size="mini"
                  @click="showEditDialog(scope.row)"></el-button>
                  <!-- 删除按钮 -->
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row)"></el-button>
              </template>
          </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[5, 10,15,20]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
      </el-pagination>
    </el-card>

    <!-- 修改商品的对话框 -->
    <el-dialog
    title="修改商品"
    :visible.sync="editDialogVisible"
    width="50%"
    @close="editDialogClosed">
      <!-- 内容修改区域 -->
      <el-form ref="editFormRef" :model="editForm" label-width="90px" :rules="editFormRules">
        <el-form-item label="商品名称" prop="goods_name">
          <el-input v-model="editForm.goods_name" clearable></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
          <el-input v-model="editForm.goods_price" type="number" clearable></el-input>
        </el-form-item>
        <el-form-item label="商品数量" prop="goods_number">
          <el-input v-model="editForm.goods_number" type="number" clearable></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
          <el-input v-model="editForm.goods_weight" type="number" clearable></el-input>
        </el-form-item>
        <el-form-item label="商品介绍" prop="goods_introduce">
          <el-input v-model="editForm.goods_weight" type="textarea"
          maxlength="50" show-word-limit rows="4"></el-input>
        </el-form-item>
      </el-form>
      <!-- 按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editGoodsInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 获取商品列表的参数对象
      queryInfo: {
        query: '',
        // 当前的页数
        pagenum: 1,
        // 当前每页显示多少条数据
        pagesize: 10
      },
      // 商品列表
      goodslist: [],
      // 总数据条数
      total: 0,
      // 修改对话框的显隐
      editDialogVisible: false,
      // 查询到的商品信息对象
      editForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        goods_introduce: ''
      },
      // 修改表单的验证规则对象
      editFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_introduce: [
          { required: false, message: '请输入商品介绍', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    // 渲染数据
    this.getGoodsList()
  },
  methods: {
    // 获取商品数据
    async getGoodsList () {
      const { data: res } = await this.$http.get('goods', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取商品列表失败')
      this.goodslist = res.data.goods
      this.total = res.data.total
      // console.log(res)
    },
    // 监听 pagesize 改变的事件
    handleSizeChange (newSize) {
    //   console.log(newSize)
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 监听 页码值 改变的事件
    handleCurrentChange (newPage) {
    //   console.log(newPage)
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 根据id删除对应的用户信息
    async removeById (id) {
      // console.log(id)
      // 弹框询问用户是否删除数据
      const confirmRsults = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      // console.log(confirmRsults)
      if (confirmRsults !== 'confirm') return this.$message.info('已取消删除')

      // console.log('确认删除')
      const { data: res } = await this.$http.delete(`goods/${id.goods_id}`)

      if (res.meta.status !== 200) return this.$message.error('删除商品失败')
      this.$message.success('删除商品成功')
      this.getGoodsList()
    },
    // 跳转到添加商品页面
    goAddpage () {
      this.$router.push('/goods/add')
    },
    // 根据id编辑对应的商品信息
    async showEditDialog (id) {
      // 获取点击到商品的数据
      const { data: res } = await this.$http.get(`goods/${id.goods_id}`)
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error('查询用户信息失败')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听用户对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 把修改的信息做提交
    editGoodsInfo () {
      // console.log(this.editForm)
      this.$refs.editFormRef.validate(async valid => {
      //   console.log(valid)
        // valid为false,直接出去
        if (!valid) return
        // valid为ture,发起修改用户数据的请求
        const { data: res } = await this.$http.put(`goods/${this.editForm.goods_id}`, this.editForm)
        // console.log(res)
        if (res.meta.status !== 200) return this.$message.error('更新用户数据失败')

        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表成功
        this.getGoodsList()
        // 提示修改数据成功
        this.$message.success('更新用户信息成功')
      })
    }
  }
}
</script>

<style scoped lang="less">

</style>
